In Hoffman reflex testing, which movement constitutes a positive response when the terminal phalanx of the thumb or index finger is stimulated?

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Study for the Parkinson’s Disease Exam. Engage with detailed flashcards and multiple-choice questions, each offering hints and explanations. Prepare effectively for your exam!

Multiple Choice

In Hoffman reflex testing, which movement constitutes a positive response when the terminal phalanx of the thumb or index finger is stimulated?

Explanation:
In Hoffman reflex testing, a positive response is when bending of the thumb and/or index finger occurs after tapping the distal phalanx. This brisk flexion of the thumb and index finger reflects upper motor neuron involvement of the corticospinal tract. In healthy individuals, this finger flexion is not produced, so seeing it suggests pyramidal tract irritation or cervical myelopathy. The other movements listed don’t represent the Hoffmann response, which specifically manifests as thumb and index finger flexion.

In Hoffman reflex testing, a positive response is when bending of the thumb and/or index finger occurs after tapping the distal phalanx. This brisk flexion of the thumb and index finger reflects upper motor neuron involvement of the corticospinal tract. In healthy individuals, this finger flexion is not produced, so seeing it suggests pyramidal tract irritation or cervical myelopathy. The other movements listed don’t represent the Hoffmann response, which specifically manifests as thumb and index finger flexion.

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